Anti-small nuclear ribonucleoprotein D2 polypeptide 16.5kDa antibodies enable researchers to detect and measure the small nuclear ribonucleoprotein D2 polypeptide 16.5kDa antigen in biological samples. This target is a reported synonym of the SNRPD2 gene, which encodes small nuclear ribonucleoprotein D2 polypeptide. This protein is known to function in RNA splicing, among other biological roles. The human version of small nuclear ribonucleoprotein D2 polypeptide 16.5kDa has a canonical amino acid length of 118 residues and a protein mass of 13.5 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the nucleus and cytoplasm of cells and widely expressed in many tissue types. Other names for this target antigen include SMD2, SNRPD1, and Sm-D2.